To sell an organic cotton garment in the UK, it must meet the Organic Certification standards of the country it was grown in as well as the relevant EU regulations. The Global Organic Textile Standard (GOTS) is the most common certification in the UK and is also very comprehensive. Generally the land the cotton was grown on must have been free of pesticides for a minimum of three years.
Organic cotton will also be free of artificial fertilisers and the soil will be improved using natural methods. GOTS certification also goes further to ensure that the farmers, as well as the factory workers, receive a fair wage for their work.